2013 March 1, Frank Fish, George Lauder, “Not Just Going with the Flow”, in American Scientist‎[1], volume 101, number 2, page 114:

An extreme version of vorticity is a vortex. The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes.

(sports, aerial freestyle skiing) "full—triple-full—full" – an acrobatic maneuver consisting of three flips and five twists, with one twist on the first flip, three twists on the second flip, one twist on the third flip